U.S. patent number 7,845,428 [Application Number 11/915,919] was granted by the patent office on 2010-12-07 for rotating tool.
This patent grant is currently assigned to Yukiwa Seiko Kabushiki Kaisha. Invention is credited to Kazuki Aoyagi, Akira Sakamaki, Kazuo Sakamaki, Tadashi Taniguchi.
United States Patent |
7,845,428 |
Sakamaki , et al. |
December 7, 2010 |
Rotating tool
Abstract
An extremely useful rotating tool is provided that can prevent
rattling caused by a clearance between a machine tool and a machine
tool retaining hole while bringing the axial center position of the
machine tool and the axial center position of the machine tool
retaining hole as close together as possible. The present invention
is a rotating tool having a rotating main shaft (4), and the
rotating main shaft (4) is provided with a machine tool retaining
hole (3) having a cross-sectional shape that substantially matches
a base part (2) of a driver bit, drill bit, or other machine tool
(1) having a polygonal cross-sectional shape that is inserted into
the machine tool retaining hole (3), wherein the rotating tool
rotates the machine tool (1) inserted in the machine tool retaining
hole (3) by rotating the rotating main shaft (4) and performs work.
A pushing mechanism is provided for rotating the machine tool (1)
in a prescribed direction and twisting and pushing the machine tool
(1) against an internal surface of the machine tool retaining hole
(3).
Inventors: |
Sakamaki; Kazuo (Ojiya,
JP), Sakamaki; Akira (Ojiya, JP),
Taniguchi; Tadashi (Ojiya, JP), Aoyagi; Kazuki
(Ojiya, JP) |
Assignee: |
Yukiwa Seiko Kabushiki Kaisha
(Niigata, JP)
|
Family
ID: |
37481430 |
Appl.
No.: |
11/915,919 |
Filed: |
May 19, 2006 |
PCT
Filed: |
May 19, 2006 |
PCT No.: |
PCT/JP2006/310020 |
371(c)(1),(2),(4) Date: |
November 29, 2007 |
PCT
Pub. No.: |
WO2006/129500 |
PCT
Pub. Date: |
December 07, 2006 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20090308629 A1 |
Dec 17, 2009 |
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Foreign Application Priority Data
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May 31, 2005 [JP] |
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2005-160677 |
Apr 12, 2006 [JP] |
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2006-110095 |
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Current U.S.
Class: |
173/164; 279/137;
279/79; 279/77; 279/906; 173/104 |
Current CPC
Class: |
B23B
31/1071 (20130101); B25B 23/0035 (20130101); Y10S
279/906 (20130101); B23B 2265/326 (20130101); Y10T
279/17769 (20150115); Y10T 279/29 (20150115); Y10T
279/17786 (20150115) |
Current International
Class: |
E21B
3/00 (20060101); B23B 31/10 (20060101) |
Field of
Search: |
;173/104,164,176
;279/19.3,22,76,79,82,77,78,137,906 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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51-121898 |
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Oct 1976 |
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JP |
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59-19271 |
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Feb 1984 |
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JP |
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10-193278 |
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Jul 1998 |
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JP |
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2002-205281 |
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Jul 2002 |
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JP |
|
2002-210671 |
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Jul 2002 |
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JP |
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2003-089071 |
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Mar 2003 |
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JP |
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2004-154882 |
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Jun 2004 |
|
JP |
|
Primary Examiner: Tawfik; Sameh H.
Assistant Examiner: Weeks; Gloria R.
Attorney, Agent or Firm: Sughrue Mion, PLLC
Claims
The invention claimed is:
1. A rotating tool having a rotating main shaft, in which the
rotating main shaft is provided with a machine tool retaining hole
having a cross-sectional shape that substantially matches a base
part of a driver bit, drill bit, or other machine tool having a
polygonal cross-sectional shape that is inserted into the machine
tool retaining hole, wherein the rotating tool rotates said machine
tool inserted in the machine tool retaining hole by rotating said
rotating main shaft and performs work; said rotating tool
characterized in that a pushing mechanism is provided for rotating
the machine tool with respect to the machine tool retaining hole so
that the machine tool is rotationally offset from the machine tool
retaining hole as viewed in cross-section while an axial center of
the machine tool and an axial center of the machine tool retaining
hole are aligned with each other, and for twisting and pushing the
machine tool against an internal surface of said machine tool
retaining hole when the machine tool is inserted in the machine
tool retaining hole.
2. The rotating tool according to claim 1, characterized in that a
sliding tube is provided to said machine tool retaining hole; and
the sliding tube allows said machine tool to be mounted in said
machine tool retaining hole, the pushing mechanism to be operated
so as to twist and push the machine tool against the internal
surface of the machine tool retaining hole through sliding of the
sliding tube.
3. The rotating tool according to claim 2, characterized in that
the sliding of said sliding tube is a single sliding movement of
the sliding tube.
4. The rotating tool according to claim 1, characterized in that a
sliding tube is provided to said machine tool retaining hole; and
the sliding tube is configured so that the machine tool is retained
in the machine tool retaining hole, said pushing mechanism is
operated, the machine tool is rotated in a prescribed direction,
and retaining of the machine tool and twisting and pushing of the
machine tool against the internal surface of the machine tool
retaining hole are accomplished when the sliding tube is slid, said
machine tool is inserted into said machine tool retaining hole, and
the sliding tube is moved back.
5. The rotating tool according to claim 1, characterized in that a
locking groove is provided to a base part of said machine tool; and
a locking body for locking in said locking groove is provided to
said machine tool retaining hole.
6. The rotating tool according to claim 5, characterized in that
said locking body is disposed in the locking groove; and said
machine tool is rotated in a prescribed direction by said pushing
mechanism.
7. The rotating tool according to any of claims 1 through 6,
characterized in that said pushing mechanism is configured so as to
twist and push said machine tool against the internal surface of
said machine tool retaining hole when an operation is performed for
attaching said machine tool, or release the twisting and pushing
when an operation is performed for detaching said machine tool.
8. The rotating tool according to claim 7, characterized in that a
sliding tube that is urged toward a proximal end or toward a distal
end is fitted to a distal end part of said machine tool retaining
hole; and said pushing mechanism is configured so that the twisting
and pushing of said machine tool against the internal surface of
said machine tool retaining hole is released by pulling of the
sliding tube to the distal end or the proximal end against an
urging force, and said machine tool is twisted and pushed against
the internal surface of said machine tool retaining hole by a
movement of said sliding tube back towards an opposite side by the
urging force.
9. The rotating tool according to claim 8, characterized in that
said locking body is placed in said locking groove when said
machine tool is twisted and pushed against the internal surface of
said machine tool retaining hole.
10. The rotating tool according to claim 9, characterized in that a
peripheral wall of said machine tool retaining hole is provided
with a protruding/retreating body for protruding from and
retreating into the peripheral wall; said protruding/retreating
body is pushed by a base part of the machine tool inserted in said
machine tool retaining hole, and can retreat into the peripheral
wall of the machine tool retaining hole in a state in which said
sliding tube is pulled against an urging force towards a distal end
or a proximal end; and said protruding/retreating body protrudes
from the peripheral wall of said machine tool retaining hole, and
twists and pushes a base part of said machine tool against the
internal surface of said machine tool retaining hole in a state in
which said sliding tube is moved back by the urging force towards
the opposite side.
11. The rotating tool according to claim 10, characterized in that
said protruding/retreating body is provided in a position facing a
peripheral wall of said machine tool retaining hole.
12. The rotating tool according to claim 10, characterized in that
said protruding/retreating body is a spherical body.
13. The rotating tool according to claim 11, characterized in that
said protruding/retreating body is a spherical body.
14. The rotating tool according to claim 1, characterized in that a
rotating body in which an insertion passage hole communicated with
said machine tool retaining hole is formed is provided to a distal
end part of said machine tool retaining hole; and the rotating body
is provided with a rotational urging mechanism for rotating the
insertion passage hole and a machine tool inserted in said machine
tool retaining hole in a prescribed direction, and twisting and
pushing the machine tool against the internal surface of said
machine tool retaining hole.
15. The rotating tool according to claim 14, characterized in that
said insertion passage hole is provided so as to be offset a
prescribed angle in relation to said machine tool retaining hole as
viewed from the front; and the insertion passage hole is moved back
by a rotational urging force when the insertion passage hole is
rotated into alignment with the machine tool retaining hole.
16. The rotating tool according to claim 14, characterized in that
a sliding tube that is urged toward a proximal end or toward a
distal end is fitted to a distal end part of said machine tool
retaining hole; and said rotational urging mechanism is configured
so that said machine tool is not rotationally urged in a prescribed
direction in a state in which said sliding tube is pulled to the
distal end or the proximal end against an urging force, and said
machine tool is rotated in the prescribed direction and twisted and
pushed against the internal surface of said machine tool retaining
hole in a state in which said sliding tube is moved back towards an
opposite side by the urging force.
17. The rotating tool according to any of claims 14 through 16,
characterized in that a locking groove is provided to a base part
of said machine tool, and a locking body for locking in said
locking groove is provided to said machine tool retaining hole.
18. The rotating tool according to claim 17, characterized in that
said locking body is disposed in the locking groove; and said
machine tool is rotated in a prescribed direction by said
rotational urging mechanism.
19. A rotating tool for rotating a machine tool inserted in a
machine tool retaining hole and performing work by rotating a
rotating main shaft, wherein the rotating tool has a rotating main
shaft; a driver bit, drill bit, or other machine tool is inserted
in the rotating main shaft; and a machine tool retaining hole
having a cross-sectional shape that substantially matches a
polygonal cross-sectional-shaped base part of the machine tool is
provided; said rotating tool characterized in that a pushing
mechanism for pushing in a state facing the vicinity of an angled
part of said machine tool inserted in said machine tool retaining
hole is provided to said rotating main shaft; the pushing mechanism
is configured so as to push in a state facing the vicinity of the
angled part of said machine tool and rotate said machine tool, and
twist and push the machine tool against an internal surface of said
machine tool retaining hole so that the machine tool is
rotationally offset from the machine tool retaining hole as viewed
in cross-section while an axial center of the machine tool and an
axial center of the machine tool retaining hole are aligned with
each other; a locking groove is provided to said base part of said
machine tool; locking bodies for locking in said locking groove and
retaining said machine tool are provided to said machine tool
retaining hole; a sliding tube that is urged towards a proximal end
or a distal end is provided to said machine tool retaining hole;
retention of the machine tool by said locking bodies is released,
and twisting and pushing of said machine tool against the internal
surface of said machine tool retaining hole by said pushing
mechanism is released when the sliding tube is pulled towards the
distal end or the proximal end against an urging force; and said
locking bodies are placed in said locking groove, said machine tool
is retained, and the machine tool is twisted and pushed against the
internal surface of said machine tool retaining hole by said
pushing mechanism when said sliding tube is moved back towards an
opposite side by the urging force.
20. A rotating tool for rotating a machine tool inserted in a
machine tool retaining hole and performing work by rotating a
rotating main shaft, wherein the rotating tool has a rotating main
shaft; a driver bit, drill bit, or other machine tool is inserted
in the rotating main shaft; and a machine tool retaining hole
having a cross-sectional shape that substantially matches a
polygonal cross-sectional-shaped base part of the machine tool is
provided; said rotating tool characterized in that a pushing
mechanism for pushing in a state facing the vicinity of an angled
part of said machine tool inserted in said machine tool retaining
hole is provided to said rotating main shaft; the pushing mechanism
is configured so as to push in a state facing the vicinity of the
angled part of said machine tool and rotate said machine tool, and
twist and push the machine tool against an internal surface of said
machine tool retaining hole so that the machine tool is
rotationally offset from the machine tool retaining hole as viewed
in cross-section while an axial center of the machine tool and an
axial center of the machine tool retaining hole are aligned with
each other; a locking groove is provided to said base part of said
machine tool; locking bodies for locking in said locking groove and
retaining said machine tool are provided to said machine tool
retaining hole; a sliding tube that is urged towards a proximal end
or a distal end is provided to said machine tool retaining hole;
twisting and pushing of said machine tool against the internal
surface of said machine tool retaining hole by said pushing
mechanism is released when the sliding tube is pulled towards the
distal end or the proximal end against an urging force; and the
machine tool is twisted and pushed against the internal surface of
said machine tool retaining hole by said pushing mechanism when
said sliding tube is moved back towards an opposite side by the
urging force.
Description
TECHNICAL FIELD
The present invention relates to a rotating tool.
BACKGROUND ART
In an impact driver, power driver, power drill, or other rotating
tool that is provided with a rotating main shaft 43 having a
machine tool retaining hole 42 into which a driver bit, drill bit,
or other machine tool 41 such as the one shown in FIG. 1 is
inserted, a clearance is conventionally provided between the
machine tool retaining hole 42 and the machine tool 41 in order to
insert various machine tools 41. In the drawing, the reference
numeral 44 indicates a steel ball for securing the machine tool, 45
indicates a locking groove for locking the steel ball 44, 46
indicates a sliding tube for pushing the steel ball 44 into the
machine tool 41, and 47 indicates a spring.
However, rattling occurs in the machine tool 41 as a matter of
course when the clearance is present. Rattling of the machine tool
41 not only adversely affects working precision or efficiency, but
also leads to damage and the like of the machine tool 41, and is
undesirable.
Therefore, in order to eliminate this rattling, the external
peripheral surface of the proximal end part of a machine tool 41
that is polygonal in cross-section may be pushed in the direction
orthogonal to the axial direction of the machine tool 41 against
the internal peripheral surface of a machine tool retaining hole 42
that substantially matches the cross-sectional shape of the
proximal end part of the machine tool 41 to eliminate a prescribed
portion of the clearance. However, when this method is used, the
axial position A of the machine tool 41 is offset from the axial
position B of the machine tool retaining hole 42, as shown in FIG.
2, run-out occurs in the machine tool 41, and satisfactory
industrial work is impossible.
DISCLOSURE OF THE INVENTION
The present invention overcomes such drawbacks as those described
above, and an object of the present invention is to provide a
rotating tool having extreme practicality that is capable of
preventing rattling without causing run-out of a machine tool.
The present invention will be briefly described with reference to
the accompanying drawings.
A first aspect of the present invention is a rotating tool having a
rotating main shaft 4 in which the rotating main shaft 4 is
provided with a machine tool retaining hole 3 having a
cross-sectional shape that substantially matches a base part 2 of a
driver bit, drill bit, or other machine tool 1 having a polygonal
cross-sectional shape that is inserted into the machine tool
retaining hole 3, wherein the rotating tool rotates the machine
tool 1 inserted in the machine tool retaining hole 3 by rotating
the rotating main shaft 4 and performs work; the rotating tool
characterized in that a pushing mechanism is provided for rotating
the machine tool 1 in a prescribed direction in a state in which
the machine tool 1 is inserted in the machine tool retaining hole
3, and twisting and pushing the machine tool 1 against an internal
surface of the machine tool retaining hole 3.
The rotating tool according to the first aspect is also
characterized in that a sliding tube 8 is provided to the machine
tool retaining hole 3, and the sliding tube 8 allows the machine
tool 1 to be mounted in the machine tool retaining hole 3, the
pushing mechanism to be operated so as to twist and push the
machine tool 1 against the internal surface of the machine tool
retaining hole 3 through sliding of the sliding tube 8.
The rotating tool according to the second aspect is characterized
in that the sliding of the sliding tube 8 is a single sliding
movement of the sliding tube 8.
The rotating tool according to the first aspect is also
characterized in that a sliding tube 8 is provided to the machine
tool retaining hole 3, and the sliding tube 8 is configured so that
the machine tool 1 is retained in the machine tool retaining hole
3, the pushing mechanism is operated, the machine tool 1 is rotated
in a prescribed direction, and retaining of the machine tool 1 and
twisting and pushing of the machine tool 1 against the internal
surface of the machine tool retaining hole 3 are accomplished when
the sliding tube 8 is slid, the machine tool 1 is inserted into the
machine tool retaining hole 3, and the sliding tube 8 is moved
back.
The rotating tool according to the first aspect is also
characterized in that a locking groove 5 is provided to a base part
2 of the machine tool 1, and a locking body 6 for locking in the
locking groove 5 is provided to the machine tool retaining hole
3.
The rotating tool according to a fifth aspect is characterized in
that the locking body 6 is disposed in the locking groove 5, and
the machine tool 1 is rotated in a prescribed direction by the
pushing mechanism.
The rotating tool according to any of the first through sixth
aspects is characterized in that the pushing mechanism is
configured so as to twist and push the machine tool 1 against the
internal surface of the machine tool retaining hole 3 when an
operation is performed for attaching the machine tool 1, or release
the twisting and pushing when an operation is performed for
attaching or detaching the machine tool 1.
The rotating tool according to a seventh aspect is characterized in
that a sliding tube 8 that is urged toward a proximal end or toward
a distal end is fitted to a distal end part of the machine tool
retaining hole 3; and the pushing mechanism is configured so that
the twisting and pushing of the machine tool 1 against the internal
surface of the machine tool retaining hole 3 is released by pulling
of the sliding tube 8 to the distal end or the proximal end against
an urging force, and the machine tool 1 is twisted and pushed
against the internal surface of the machine tool retaining hole 3
by a reciprocating movement of the sliding tube 8 towards an
opposite side by the urging force.
The rotating tool according to an eighth aspect is characterized in
that the locking body 6 is placed in the locking groove 5 when the
machine tool 1 is twisted and pushed against the internal surface
of the machine tool retaining hole 3.
The rotating tool according to a ninth aspect is characterized in
that a peripheral wall of the machine tool retaining hole 3 is
provided with a protruding/retreating body 7 for protruding from
and retreating into the peripheral wall; the protruding/retreating
body 7 is pushed by a base part 2 of the machine tool 1 inserted in
the machine tool retaining hole 3, and can retreat into the
peripheral wall of the machine tool retaining hole 3 in a state in
which the sliding tube 8 is pulled against an urging force towards
a distal end or a proximal end; and the protruding/retreating body
7 protrudes from the peripheral wall of the machine tool retaining
hole 3, and twists and pushes a base part 2 of the machine tool 1
against the internal surface of the machine tool retaining hole 3
in a state in which the sliding tube 8 is moved back by the urging
force towards the opposite side.
The rotating tool according to a tenth aspect is characterized in
that the protruding/retreating body 7 is provided in a position
facing a peripheral wall of the machine tool retaining hole 3.
The rotating tool according to the tenth aspect is also
characterized in that the protruding/retreating body 7 is a
spherical body.
The rotating tool according to an eleventh aspect is characterized
in that the protruding/retreating body 7 is a spherical body.
The rotating tool according to the first aspect is also
characterized in that a rotating body 10 in which an insertion
passage hole 9 communicated with the machine tool retaining hole 3
is formed is provided to a distal end part of the machine tool
retaining hole 3, and the rotating body 10 is provided with a
rotational urging mechanism for rotating the insertion passage hole
9 and a machine tool 1 inserted in the machine tool retaining hole
3 in a prescribed direction, and twisting and pushing the machine
tool 1 against the internal surface of the machine tool retaining
hole 3.
The rotating tool according to a fourteenth aspect is characterized
in that the insertion passage hole 9 is provided so as to be offset
a prescribed angle in relation to the machine tool retaining hole 3
as viewed from the front, and the insertion passage hole 9 is moved
back by a rotational urging force when the insertion passage hole 9
is rotated to conform to the machine tool retaining hole 3.
The rotating tool according to the fourteenth aspect is also
characterized in that a sliding tube 8 that is urged toward a
proximal end or toward a distal end is fitted to a distal end part
of the machine tool retaining hole 3; and the rotational urging
mechanism is configured so that the machine tool 1 is not
rotationally urged in a prescribed direction in a state in which
the sliding tube 8 is pulled to the distal end or the proximal end
against an urging force, and the machine tool 1 is rotated in the
prescribed direction and twisted and pushed against the internal
surface of the machine tool retaining hole 3 in a state in which
the sliding tube 8 is moved back towards an opposite side by the
urging force.
The rotating tool according to any of the fourteenth through
sixteenth aspects is characterized in that a locking groove 5 is
provided to a base part 2 of the machine tool 1, and a locking body
6 for locking in the locking groove 5 is provided to the machine
tool retaining hole 3.
The rotating tool according to a seventeenth aspect is
characterized in that the locking body 6 is disposed in the locking
groove 5, and the machine tool 1 is rotated in a prescribed
direction by the rotational urging mechanism.
The present invention is also a rotating tool for rotating a
machine tool 1 inserted in a machine tool retaining hole 3 and
performing work by rotating a rotating main shaft 4, wherein the
rotating tool has a rotating main shaft 4; a driver bit, drill bit,
or other machine tool 1 is inserted in the rotating main shaft 4;
and a machine tool retaining hole 3 having a cross-sectional shape
that substantially matches a polygonal cross-sectional-shaped base
part 2 of the machine tool is provided; the rotating tool
characterized in that a pushing mechanism for pushing in a state
facing the vicinity of an angled part of the machine tool 1
inserted in the machine tool retaining hole 3 is provided to the
rotating main shaft 4; the pushing mechanism is configured so as to
push in a state facing the vicinity of the angled part of the
machine tool and rotate the machine tool, and twist and push the
machine tool against an internal surface of the machine tool
retaining hole 3; a locking groove 5 is provided to the base part 2
of the machine tool; locking bodies 6 for locking in the locking
groove 5 and retaining the machine tool are provided to the machine
tool retaining hole 3; a sliding tube 8 that is urged towards a
proximal end or a distal end is provided to the machine tool
retaining hole 3; retention of the machine tool by the locking
bodies 6 is released, and twisting and pushing of the machine tool
against the internal surface of the machine tool retaining hole 3
by the pushing mechanism is released when the sliding tube 8 is
pulled towards the distal end or the proximal end against an urging
force; and the locking bodies 6 are placed in the locking groove 5,
the machine tool is retained, and the machine tool is twisted and
pushed against the internal surface of the machine tool retaining
hole 3 by the pushing mechanism when the sliding tube 8 is moved
back towards an opposite side by the urging force.
The present invention is also a rotating tool for rotating a
machine tool 1 inserted in a machine tool retaining hole 3 and
performing work by rotating a rotating main shaft 4, wherein the
rotating tool has a rotating main shaft 4; a driver bit, drill bit,
or other machine tool 1 is inserted in the rotating main shaft 4;
and a machine tool retaining hole 3 having a cross-sectional shape
that substantially matches a polygonal cross-sectional-shaped base
part 2 of the machine tool is provided; the rotating tool
characterized in that a pushing mechanism for pushing in a state
facing the vicinity of an angled part of the machine tool 1
inserted in the machine tool retaining hole 3 is provided to the
rotating main shaft 4; the pushing mechanism is configured so as to
push in a state facing the vicinity of the angled part of the
machine tool and rotate the machine tool, and twist and push the
machine tool against an internal surface of the machine tool
retaining hole 3; a locking groove 5 is provided to the base part 2
of the machine tool; locking bodies 6 for locking in the locking
groove 5 and retaining the machine tool are provided to the machine
tool retaining hole 3; a sliding tube 8 that is urged towards a
proximal end or a distal end is provided to the machine tool
retaining hole 3; twisting and pushing of the machine tool against
the internal surface of the machine tool retaining hole 3 by the
pushing mechanism is released when the sliding tube 8 is pulled
towards the distal end or the proximal end against an urging force;
and the machine tool is twisted and pushed against the internal
surface of the machine tool retaining hole 3 by the pushing
mechanism when the sliding tube 8 is moved back towards an opposite
side by the urging force.
The present invention is configured as described above, and is
therefore an extremely useful rotating tool that can prevent
rattling caused by a clearance between a machine tool and a machine
tool retaining hole while bringing the axial center position of the
machine tool and the axial center position of the machine tool
retaining hole as close together as possible.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic sectional view showing the conventional
example;
FIG. 2 is a sectional view showing the conventional example;
FIG. 3 is a schematic sectional view showing Example 1;
FIG. 4 is a schematic sectional view showing Example 1;
FIG. 5 is a schematic perspective view showing the relevant parts
of Example 1;
FIG. 6 is a schematic exploded perspective view showing the
relevant parts of Example 1;
FIG. 7 is a schematic sectional view showing Example 1;
FIG. 8 is a schematic perspective view showing Example 2;
FIG. 9 is a schematic exploded perspective view showing Example
2;
FIG. 10 is a schematic sectional view (along line A-A in FIG. 13)
showing Example 2;
FIG. 11 is a schematic sectional view (along line B-B in FIG. 14)
showing Example 2;
FIG. 12 is a schematic front view showing Example 2;
FIG. 13 is a schematic front view showing Example 2;
FIG. 14 is a schematic front view showing Example 2;
FIG. 15 is a schematic sectional view (along line C-C in FIG. 11)
showing Example 2;
FIG. 16 is an enlarged schematic sectional view (along line D-D in
FIG. 13) showing the relevant parts of Example 2;
FIG. 17 is a schematic exploded perspective view showing the
relevant parts of Example 3;
FIG. 18 is a schematic sectional view (along line A'-A' in FIG. 21)
showing Example 3;
FIG. 19 is a schematic sectional view (along line B'-B' in FIG. 22)
showing Example 3;
FIG. 20 is a schematic front view showing Example 3;
FIG. 21 is a schematic front view showing Example 3;
FIG. 22 is a schematic front view showing Example 3; and
FIG. 23 is an enlarged schematic sectional view (along line D'-D'
in FIG. 21) showing the relevant parts of Example 3.
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention are briefly
described below with reference to the diagrams while indicating the
effects of the present invention.
A driver bit or other machine tool 1 is inserted into the machine
tool retaining hole 3 of the rotating main shaft 4, and work is
performed using the machine tool 1.
At this time, the machine tool 1 can be rotated in a prescribed
direction by a pushing mechanism, and the machine tool 1 can be
twisted and pushed against the internal surface of the machine tool
retaining hole 3.
Consequently, rattling of the machine tool 1 is, of course,
inhibited by the twisting and pushing against the internal surface
of the machine tool retaining hole 3, the axial center position of
the machine tool 1 and the axial center position of the machine
tool retaining hole 3 are brought as close together as possible,
and run-out of the machine tool 1 is prevented.
Work can thus be performed satisfactorily using the machine tool
1.
Example 1
Example 1 of the present invention will be described based on FIGS.
3 through 7.
Example 1 is a rotating tool having a rotating main shaft 4 in
which the rotating main shaft 4 is provided with a machine tool
retaining hole 3 having a cross-sectional shape that substantially
matches a base part 2 of a driver bit, drill bit, or other machine
tool 1 having a polygonal cross-sectional shape that is inserted
into the machine tool retaining hole 3, wherein the rotating tool
rotates the machine tool 1 inserted in the machine tool retaining
hole 3 by rotating the rotating main shaft 4 and performs work. The
rotating tool is provided with a pushing mechanism for rotating the
machine tool 1 in a prescribed direction in a state in which the
machine tool 1 is inserted in the machine tool retaining hole 3,
and twisting and pushing the machine tool 1 against an internal
surface of the machine tool retaining hole 3.
As shown in FIG. 3, Example 1 is an example in which the present
invention is applied to a so-called impact driver 13 in which a
pair of anvils 11 that protrude in the direction orthogonal to the
axial center direction of the rotating main shaft 4 is provided to
the proximal end of the rotating main shaft 4, hammers 12 are also
provided in which a tapered striking surface strikes forward while
applying a rotational force to the pair of anvils 11, and the
anvils 11 are struck by the hammers 12, whereby a forward impact is
applied while the machine tool 1 (rotating main shaft 4) is
rotated, and work is performed. The reference numeral 14 in the
drawing indicates a drive mechanism for driving the hammers. The
present invention is not limited to an impact driver, and may also
be applied to another power driver, power drill, or the like.
Each component will be specifically described.
A locking groove 5 is provided to the base part 2 of the machine
tool 1, and locking bodies 6 for locking in the locking groove 5
are provided to the machine tool retaining hole 3.
Specifically, a locking groove 5 having the shape of a semi arc as
viewed in cross-section into which steel balls as the locking
bodies 6 are locked is provided to the base part 2 of the machine
tool 1, and a first tapered hole 15 into which the steel ball
freely fits and expands to the outside is provided to the distal
end part of the peripheral wall of the machine tool retaining hole
3. The inside open part of the first tapered hole 15 has a diameter
whereby the steel ball protrudes and fits into the locking groove 5
without separating. The first tapered hole 15 is provided in a
position facing the peripheral wall of the machine tool retaining
hole 3.
The steel balls as the locking bodies 6 are pushed by a first
pushing part 17 provided to a sliding tube 8 described
hereinafter.
The pushing mechanism is provided to the peripheral wall of the
machine tool retaining hole 3, and is composed of
protruding/retreating bodies 7 (steel balls), and a second pushing
part 18 that is provided to the sliding tube 8 described
hereinafter.
Specifically, as shown in FIG. 7, the protruding/retreating bodies
7 are steel balls, and a second tapered hole 16 in which the steel
balls as the protruding/retreating bodies 7 are freely fitted is
provided in an opposing position further towards the proximal end
of the machine tool retaining hole 3 than the first tapered hole 15
in which the locking bodies 6 are freely fitted in the peripheral
wall.
The second tapered hole 16 has a structure in which the
large-diameter part connects to the small-diameter part at which
the angled part of the machine tool 1 inserted in the machine tool
retaining hole 3 is positioned, and is configured so that the
opposite sides of the steel balls push in the vicinity of the
angled part of the machine tool 1, and the machine tool 1 is
twisted (rotated) when the steel balls positioned in the
large-diameter part are pushed by the second pushing part 18 of the
sliding tube 8.
A configuration is adopted in Example 1 in which the
protruding/retreating bodies 7 are provided in opposing positions
in the peripheral wall of the machine tool retaining hole 3, but
the pair of protruding/retreating bodies 7 may be provided in
non-opposing positions, three protruding/retreating bodies 7 may be
provided at equal intervals, a single protruding/retreating body 7
may be provided (this configuration is not preferred), or another
configuration may be adopted insofar as the machine tool 1 can be
rotated in a prescribed direction and twisted and pushed against
the internal surface of the machine tool retaining hole 3. A
configuration may also be adopted in which a plurality of pushing
mechanisms is provided in the length direction (length direction of
the machine tool retaining hole 3) of the machine tool 1.
Example 1 is configured so that the locking bodies 6 are placed in
the locking groove 5 when the machine tool 1 is twisted and pushed
against the internal surface of the machine tool retaining hole 3.
Specifically, a configuration is adopted whereby the machine tool 1
is inserted in the machine tool retaining hole 3, and placing of
the locking bodies 6 in the locking groove 5 occurs simultaneously
with rotation of the machine tool 1 in the prescribed direction by
the pushing mechanism.
Specifically, the sliding tube 8 urged towards the proximal end is
fitted in the distal end part of the machine tool retaining hole 3
as shown in FIGS. 5 and 6. The sliding tube 8 is urged towards the
proximal end by a spring 19 that is held by a washer 20 and the
first pushing part 17 described hereinafter between the internal
peripheral surface of the sliding tube 8 and the peripheral wall of
the machine tool retaining hole 3. The reference numeral 21 in the
drawing is a ring for supporting the washer 20 and preventing loss
of the spring 19. The sliding tube 8 may also be configured so as
to be urged towards the distal end.
The sliding tube 8 is configured so that when the locking bodies 6
and the protruding/retreating bodies 7 are pushed by the base part
2 of the machine tool 1 inserted in the machine tool retaining hole
3 in a state in which the sliding tube 8 is pulled towards the
distal end against the urging force of the spring 19, the locking
bodies 6 and the protruding/retreating bodies 7 retreat into the
peripheral wall of the machine tool retaining hole 3, the locking
bodies 6 are positioned between the first pushing part 17 and the
second pushing part 18, and the protruding/retreating bodies 7 are
positioned towards the proximal end of the second pushing part 18.
The sliding tube 8 is also configured so that the locking bodies 6
and the protruding/retreating bodies 7 protrude from the peripheral
wall of the machine tool retaining hole 3 in a state in which the
sliding tube 8 is urged towards the proximal end.
Specifically, the first pushing part 17 for preventing the retreat
of the locking bodies 6 and pushing the locking bodies 6 out
towards the machine tool 1 from the first tapered hole 15, and the
second pushing part 18 for preventing the retreat of the
protruding/retreating bodies 7 and pushing the
protruding/retreating bodies 7 out towards the machine tool 1 from
the second tapered hole 16 are provided in protruding fashion to
the internal peripheral surface of the sliding tube 8, as shown in
FIG. 4.
The distal-end side surface of the first pushing part 17 is
configured as a supporting surface for supporting one side of the
spring 19.
The first pushing part 17 and the second pushing part 18 push the
locking bodies 6 and protruding/retreating bodies 7 of the first
tapered hole 15 and the second tapered hole 16 into which the
locking bodies 6 and protruding/retreating bodies 7 are freely
fitted out into the machine tool retaining hole 3 in a state in
which the sliding tube 8 is urged towards the proximal end of the
rotating main shaft 4, and the locking bodies 6 and
protruding/retreating bodies 7 therefore allowed to retreat into
the first tapered hole 15 and the second tapered hole 16 in a state
in which the sliding tube 8 is pulled against the urging force
towards the distal end of the rotating main shaft 4.
Accordingly, when the base part 2 of the machine tool 1 is inserted
in the machine tool retaining hole 3, the sliding tube 8 is pulled
against the urging force towards the distal end of the rotating
main shaft 4, the steel balls are allowed to retreat in conjunction
with the insertion of the machine tool 1, and the base part 2 of
the machine tool 1 is placed inside the machine tool retaining hole
3, after which pulling of the sliding tube 8 is stopped, and the
sliding tube 8 is urged towards the proximal end (moved back by the
urging force in the opposite direction), whereby the steel balls
are caused to protrude inward, the base part 2 of the machine tool
1 is locked by the locking bodies 6, and the base part 2 of the
machine tool 1 can be rotated in the prescribed direction by the
protruding/retreating bodies 7. Retention (installation) of the
machine tool 1 in the machine tool retaining hole 3, and twisting
and pushing of the machine tool 1 against the internal surface of
the machine tool retaining hole 3 can both be performed through the
extremely simple sliding operation, i.e., a single sliding motion
(a single pull and the return movement that accompanies the pull),
of the sliding tube 8.
The steel balls as the locking bodies 6 lock into the locking
groove 5 formed in the base part 2 of the machine tool 1, and
prevent the machine tool 1 from pulling out, and the steel balls as
the protruding/retreating bodies 7 twist and push the machine tool
1 against the internal surface of the machine tool retaining hole
3.
In Example 1, the base part 2 of the machine tool 1 is thus twisted
and pushed against the internal surface of the machine tool
retaining hole 3 by the protruding/retreating bodies 7, the machine
tool 1 is held between the protruding/retreating bodies 7 and the
internal surface of the machine tool retaining hole 3, and rattling
of the machine tool 1 can be prevented at the same time as the
machine tool 1 is being retained in the machine tool retaining hole
3 as in the conventional technique.
Since rattling of the machine tool 1 can be prevented by rotating
the machine tool 1 in the prescribed direction, misalignment of the
axial center position A of the machine tool 41 with the axial
center position B of the machine tool retaining hole 42 such as in
the conventional technique can be prevented as fully as
possible.
In particular, the base part 2 of the machine tool 1, which is
hexagonal as viewed in cross-section, is twisted and pushed against
the internal surface of the machine tool retaining hole 3 having
substantially the same cross-sectional shape as the base part by
the pair of equally protruding protruding/retreating bodies 7 in
the manner described above in Example 1. Therefore, the machine
tool 1 having a hexagonal cross-sectional shape rotates and slides
along the opposing internal surface of the machine tool retaining
hole 3, the axial center position O of the machine tool 1 is
positioned so as to coincide with the axial center position O' of
the machine tool retaining hole 3 as much as possible within the
machine tool retaining hole 3, the axial center positions of the
machine tool 1 and the machine tool retaining hole 3 are brought as
close together as possible, and run-out of the machine tool 1
during work is thus inhibited.
In Example 1, the second tapered hole 16 is provided as shown in
FIG. 7 so that the protruding/retreating bodies 7 freely fitted in
the second tapered hole 16 are positioned near the right side of
the angled part of the machine tool 1.
Consequently, when the rotating main shaft 4 is rotated to the
right (rotated in the screw-tightening direction), the angled part
of the machine tool 1 that is held between the
protruding/retreating bodies 7 and the internal surface of the
machine tool retaining hole 3 is strongly pushed against the
internal surface of the machine tool retaining hole 3, and when the
rotating main shaft 4 is rotated to the left (rotated in the
screw-loosening direction), the external peripheral surface of the
machine tool 1 that comes in contact with the protruding/retreating
bodies 7 is strongly pushed by the protruding/retreating bodies
7.
Steel balls (spherical bodies) are used as the locking bodies 6 and
the protruding/retreating bodies 7 in Example 1, but pin bodies or
bodies having another shape may also be used.
Because Example 1 has the configuration described above, the
machine tool 1 is rotated in the prescribed direction by the
pushing mechanism, and the machine tool 1 can be twisted and pushed
against the internal surface of the machine tool retaining hole 3
when the driver bit or other machine tool 1 is inserted in the
machine tool retaining hole 3 of the rotating main shaft 4, and
work is performed by the machine tool 1. Consequently, rattling of
the machine tool 1 is, of course, inhibited by the twisting and
pushing against the internal surface of the machine tool retaining
hole 3, the axial center position of the machine tool 1 and the
axial center position of the machine tool retaining hole 3 are
brought as close together as possible, and run-out of the machine
tool 1 is prevented. Work can thus be performed satisfactorily
using the machine tool 1.
The machine tool 1 can be retained and also prevented from rattling
at the same time, merely by pulling the sliding tube 8 towards the
distal end and inserting the machine tool 1 in the machine tool
retaining hole 3, and productivity is not compromised.
Since the same steel balls as those of the locking bodies 6 are
used for the protruding/retreating bodies 7, the present invention
can be manufactured at a correspondingly lower cost.
Example 1 is therefore an extremely useful rotating tool that can
prevent rattling caused by a clearance between a machine tool and a
machine tool retaining hole while bringing the axial center
position of the machine tool and the axial center position of the
machine tool retaining hole as close together as possible.
Example 2
Example 2 of the present invention will be described based on FIGS.
8 through 16.
Instead of the pushing mechanism of Example 1, a configuration is
adopted in Example 2 in which a rotating body 10 in which an
insertion passage hole 9 communicated with the machine tool
retaining hole 3 is provided to the distal end part of a machine
tool retaining hole 3 such as the one shown in FIGS. 8 and 9, and
the rotating body 10 is provided with a rotational urging mechanism
for rotating the insertion passage hole 9 and a machine tool 1
inserted in the machine tool retaining hole 3 in a prescribed
direction.
The sliding tube 8 urged towards the proximal end is fitted to the
distal end part of the machine tool retaining hole 3, and the
rotational urging mechanism is provided between the machine tool
retaining hole 3 and the sliding tube 8.
Specifically, as shown in FIG. 16, a pair of locking tabs 27, 28
for engaging with concave grooves 29 formed in the rotating main
shaft 4 is provided to the rotating body 10, and the rotating body
10 is provided to the distal end of the machine tool retaining hole
3 in a state in which the rotating body 10 is twisted (rotationally
urged) at a prescribed angle by a substantially C-shaped elastic
body 22 in which one end 22a thereof is locked in a groove part 25
provided to the rotating main shaft 4, and the other end 22b is
locked in a groove part 26 provided to one of the locking tabs 28
of the rotating body 10.
The insertion passage hole 9 of the rotating body 10, and the
machine tool retaining hole 3 of the rotating main shaft 4 have a
hexagonal cross-sectional shape that fits with the hexagonal base
part 2 of the machine tool 1.
Since the rotating body 10 is twisted a prescribed angle with
respect to the machine tool retaining hole 3 as described above,
when the base part 2 of the machine tool 1 is passed through the
insertion passage hole 9 and inserted in the machine tool retaining
hole 3, the rotating body 10 is rotated in the direction in which
the elastic body 22 is elongated (i.e., the direction opposite that
of the return urging of the elastic body 22), and the insertion
passage hole 9 must be aligned with the machine tool retaining hole
3. Consequently, in the state in which the base part 2 of the
machine tool 1 is inserted in the machine tool retaining hole 3,
the base part 2 of the machine tool 1 is rotationally urged by the
internal edge of the insertion passage hole 9, and the base part 2
is twisted and pushed.
In the present example, a configuration is adopted in which the
insertion passage hole 9 of the rotating body 10 is offset
10.5.degree. in relation to the machine tool retaining hole 3 (see
FIG. 12), and the base part 2 of the machine tool 1 that is
rotationally urged by the rotating body 10 is offset 5.3.degree. in
relation to the machine tool retaining hole 3 (see FIG. 15).
Consequently, in the same manner as in Example 1, the sliding tube
8 is pulled towards the distal end of the rotating main shaft 4 as
shown in FIG. 10, the locking bodies 6 are retreated in conjunction
with the insertion of the machine tool 1, and the base part 2 of
the machine tool 1 is placed within the machine tool retaining hole
3 when the base part 2 of the machine tool 1 is inserted in the
machine tool retaining hole 3. Pulling of the sliding tube 8 is
then stopped, and the sliding tube 8 is urged towards the proximal
end, whereby the locking bodies 6 are allowed to protrude inward as
shown in FIG. 11, the base part 2 of the machine tool 1 is locked
by the locking bodies 6, and the machine tool 1 can be retained in
the machine tool retaining hole 3.
Furthermore, when the base part 2 of the machine tool 1 is inserted
and passed through the insertion passage hole 9 of a rotating body
10 such as the one shown in FIG. 12 and inserted in the machine
tool retaining hole 3, the rotating body 10 is rotated by the base
part 2 of the machine tool 1 in the direction in which the elastic
body is elongated as described above (see FIG. 13), but when
insertion of the base part 2 of the machine tool 1 is completed,
and the machine tool 1 is no longer held in hand, the base part 2
of the machine tool 1 is twisted and pushed against the internal
surface of the machine tool retaining hole 3 by the return urging
of the elongated elastic body 22 (see FIG. 14).
Example 2 is thus configured so that the machine tool 1 is twisted
and pushed against the internal surface of the machine tool
retaining hole 3 by the rotating body 10, the machine tool 1 is
held between the rotating body 10 and the internal surface of the
machine tool retaining hole 3, and rattling of the machine tool 1
can be prevented at the same time as the operation for retaining
the machine tool 1 in the machine tool retaining hole 3 is
performed, merely by implementing a simple improvement in an
existing rotating tool.
Other effects are the same as in Example 1.
Example 3
Example 3 of the present invention will next be described based on
FIGS. 17 through 23.
The rotational urging mechanism of Example 3 differs from the
rotational urging mechanism of Example 2 in that an insertion
passage hole 9 is not rotated by insertion of the machine tool
1.
Specifically, the sliding tube 8 urged towards the proximal end is
fitted in the distal end part of the machine tool retaining hole 3,
and an urging force does not act on the rotating body 10 when the
sliding tube 8 is pulled towards the distal end against an urging
force. The machine tool 1 is thus not rotationally urged in a
prescribed direction. In a state in which the sliding tube 8 is
moved back by the urging force towards the proximal end, the
machine tool 1 is rotated in the prescribed direction, and the
machine tool 1 is twisted and pushed against the internal surface
of the machine tool retaining hole 3.
In the same manner as in Example 2, a pair of locking tabs 27, 28
for engaging with concave grooves 29 formed in the rotating main
shaft 4 is provided to the rotating body 10 as shown in FIG. 23,
and the rotating body 10 is provided to the distal end of the
machine tool retaining hole 3 in a state in which the rotating body
10 is twisted (rotationally urged) at a prescribed angle by a
substantially C-shaped elastic body 22 in which one end 22a thereof
is locked in a groove part 25 provided to the rotating main shaft
4, and the other end 22b is locked in a groove part 26 provided to
one of the locking tabs 28 of the rotating body 10.
As shown in FIGS. 17 through 19, a configuration is adopted in
Example 3 in which a tapered open part 23 having a diameter that
increases towards the distal end, and a small-diameter straight
part 24 that is connected with the tapered open part 23 are
provided to the internal surface of the distal end part of the
sliding tube 8. In a state in which the sliding tube 8 is urged
towards the proximal end, the elastic body 22 is positioned in the
tapered open part 23 that does not receive external pressure, and
in a state in which the sliding tube 8 is pulled towards the distal
end, the elastic body 22 is placed in the small-diameter straight
part 24 on the proximal end side along the tapered open part 23 of
the sliding tube 8.
The elastic body 22 placed in the small-diameter straight part 24
is configured so that the curvature thereof is reduced, and the
rotating body 10 is rotationally urged in the elongation direction
of the elastic body 22 by a commensurate amount by the pushing of
the elastic body 22 inward along the internal surface of the
small-diameter straight part 24, and the angle of misalignment of
the rotating body 10 in relation to the machine tool retaining hole
3 of the insertion passage hole 9 decreases. Specifically, in
Example 3, when the elastic body 22 is positioned in the
small-diameter straight part 24, the rotating body 10 is
rotationally urged so that the machine tool retaining hole 3 and
the insertion passage hole 9 are exactly aligned with each
other.
Accordingly, when the sliding tube 8 is pulled towards the distal
end of the rotating main shaft 4 against the urging force as shown
in FIG. 18 in order to insert the base part 2 of the machine tool 1
in the machine tool retaining hole 3, the elastic body 22
positioned in the tapered open part 23 of the internal surface of
the distal end of the sliding tube 8 as shown in FIG. 20 is placed
in the small-diameter straight part 24 on the proximal end side
along the tapered open part 23 (see FIG. 21), and is pushed inward
by the small-diameter straight part 24. As a result, the elastic
body 22 rotationally urges the rotating body 10 in the elongation
direction of the elastic body 22, and the machine tool retaining
hole 3 and the insertion passage hole 9 are aligned with each
other.
When the machine tool 1 is inserted into the aligned insertion
passage hole 9 and machine tool retaining hole 3, and the sliding
tube 8 is moved back, the elastic body 22 moves from the
small-diameter straight part 24 to the tapered open part 23, and is
retained in a state of misalignment at a prescribed angle in
relation to the machine tool retaining hole 3. The rotating body 10
rotationally urges the base part 2 of the machine tool 1, and the
base part 2 of the machine tool 1 is twisted and pushed against the
internal surface of the machine tool retaining hole 3.
Specifically, in Example 2, when the machine tool retaining hole 3
and the insertion passage hole 9 of the rotating body 10 are not
aligned during insertion of the machine tool 1, and the base part 2
of the machine tool 1 is inserted and passed through the insertion
passage hole 9, the rotating body 10 must be slightly twisted and
pushed to insert and pass the base part 2 of the machine tool 1
into the machine tool retaining hole 3. However, in Example 3, when
the machine tool 1 is smoothly inserted to the machine tool
retaining hole 3 (an urging force does not act on the rotating body
10), and the sliding tube 8 is moved back in a state in which the
sliding tube 8 is pulled, and the machine tool retaining hole 3 and
insertion passage hole 9 are aligned with each other, the base part
2 of the machine tool is twisted and pushed by the urging force,
and productivity is correspondingly improved.
Other effects are the same as in Example 2.
* * * * *